Thread: Is "case sizing" a requirement when reloading 12 gauge hulls ?

Sorry if my Title seems weird, but I face a problem with reloading a slab of Rio hulls with 1 inch brass bases and both my MEC 600 Junior and Lee Load-all have a problem with not releasing the hulls with a longer metal base. Because the metal base is longer than normal, the metal sizing ring will not separate from the hull after sizing, leaving the metal sizing ring still firmly around the the hull's metal base.



i have to remove the hull from the reloader, place the hull and metal sizing ring into a vice, tighten on the ring and then drive the hull off the ring with a shaft and hammer. I note that the Rio cardboard boxes are marked as "Unsuitable for Reloading" and wonder if this is the reason why they are so marked.

Are there fittings available to cope with the longer brass or, as the hulls after reloading will be used in the same gun which fired them, then as with brass centre fire cases, resizing is not necessary?